Package for fluids



Feb. 15, 1944. I;..DE KADT 2,341,601

PACKAGE FOR FLUIDS Filed Sept. 14, 1940 FIG-3 Patented Feb. 15, 1944PACKAGE FOR FLUIDS Louis deKadt, Amsterdam, Netherlands; vested in theAlien Property Custodian Application September 14, 1940, Serial No.356,770

8 Claims.

This invention relates to collapsible tubes for the dispensing of fluidand viscous substances such as cream, milk, oil and the like.

It is an object of the invention to provide for such a collapsible tube,which can be sealed against the entrance of air whenever part of itscontent has been dispensed.

The tube according to this invention is formed of a soft metal, ispreferably formed with a flat bottom and can be sealed at the dispensingend by rolling up this end of the tube. The means for thus rolling upone end of the tube is combined with means for piercing the tube wall intwo places, thereby enabling a certain quantity of air to enter the tubeand a corresponding quantity of the contents to be withdrawn, whereuponthe two perforations are closed again by rolling up the tube walls.

In the drawing affixed to this specification and forming part thereofsome embodiments of the invention are illustrated. diagrammatically byway of example.

In the drawing Fig. 1 is a side elevation and Fig. 2 is a frontelevation of a tube according to the invention with its parts in thepositions they assume directly before or after liquid has beendispensed.

Fig. 3 is a perspective view of the top part of the same tube after itsairtight seal has been restored.

Fig. 4 is a side elevation of a modified form of the invention, whileFig. 5 is a plan view of the sealing and piercing device combined withthis form.

Fig. 6 shows a third modification,

Figs. 7 and 8 shows a four modification and Fig. 9 a fifth modificationof the invention.

Referring to the drawing and first to Figs. 1-3, I is the soft metalcylinder constituting the tube and 2 is its fiat bottom. After'the tubehas been filled through its open top end, this end may be flattened andsealed by fusing or soldering.

In order to dispense some of the contents, a metal strip 3 having itsends formed into wire scrolls 4 with sharp points 5 is placed on theflattened tube end which is then folded around the strip and furtherrolled up by turning the wire scrolls projecting on both sides. Thesharpened ends 5 of the wire scrolls, being directed against oppositesides of the tube wall, can now be forced into the soft metal so as topierce two holes, shown at I.

Through one of these holes some of the liquid in the tube can now escapein proportion as air enters through the other. By then turning the strip3 by means of the end scrolls the perforated part of the tube can now berolled up farther, until the two holes are covered up by the oppositewalls of the tubes. The freshly sealed tube is shown in Fig. 3.

In the modification shown in Figs. 4 and 5 the strip is formed with aslit 8 by means of which the strip may be slid over the flattened end ofthe tube, whereby a more perfect resealing of the tube is obtained.

As shown in Fig. 6, if the flattened top end of the tube is long enough,it may be folded with out the slotted strip, which is then seatedbetween the filled part and the folded fiat part of the tubes enablingthe folded tube walls to be strongly pressed together, thus producing aparticularly tight seal. In that case, the scrolls 4 are in a horizontalposition wherein the wire points 5 are not directed towards the tubewall. This is no disadvantage, since the pointed ends of the scrolls caneasily be twisted through an angle of to bring the points 5 in front ofthe tube Walls. On the other hand. during transport of the tubespressure exerted on the scrolls will do no harm, since in the positionshown in the drawing the points would not enter and pierce the metal.

Figs. 7 and 8 show a modified form of the metal strip 3 which is ofgreater width, forming a longitudinally foldable member 9 forming achannel which surrounds the fiat top part of the tube after it has beenfolded. The seal thus obtained is strong enough to even resist the gaspressure developed by aerated liquids. Part 9 of the strip may be formedwith projecting ends iii (shown in dotted lines) which can be foldedsideways around the tube edges, thereby strengthening the sea1 further.

In the modification shown in Fig. 9 a separate cap formed by a channel Hembraces both the flattened and folded end of the tube and a strip 3such as shown for instance in Fig. 2.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim:

1. Collapsible container for the portion-wise dispensing of liquid andviscous substances comprising in combination, a tube of foldablematerial closed at the bottom end, the top end being flattened andfolded, and resilient means mounted on the flattened end for piercingthe tube wall below said flattened end to produce a hole for thewithdrawal of some of its content.

2. The container of claim 1, in which a folding tool mounted on theflattened tube end carries the piercing means.

3. The container of claim 1, in which a metal strip of greater lengththan the width of the flattened tube end engages said flattened tubeend, the ends of said strip projecting on both sides of the tube andbeing curved back to extend in the direction and into close vicinity ofthe tube wall.

4. The container of claim 1, in which a metal with a sharp point at theend, spirally wound to strip engages the flattened tube end and is 3formed with laterally projecting extensions of wire-section and withsharply pointed ends curved back towards the tube wall.

5. The container of claim 1, in which a metal channel engages theflattened tube end and is formed with laterally projecting extensions ofform a resilient scroll, forms the piercing means. 8. The containe ofclaim 1, in which a wire with sharp points at both ends, which arespirally 'woundto form resilient scrolls, forms the piercing means.

LOUIS ns KADT.

